Lubricator.



Umano-STATES PATENT vopinion. WILLIAM cLoTnwoRTHY, F esann'aarnis, anoniem.I

LUnnIcATon.

Specicaton of Letters Patent.

A No. 915,937

Patented Mama 2a, i909.

Applica-im sied im. e, 1906. mi nefga'ma.

To all whom it may concern:

Be it known that I, WILLIAM CLolrn- WoRTnY, a citizen of' the United States, re-

Kent and State of Michigan, have invented a new and useful Lubricator, of which the following is a specification.

This invention relates to lubricators and has special reference to. force feed lubricators adapted to feed asolid orsemi-solid lubricant.

One object of the invention is to provide an 1m roved form of such lubrieatorso arrange( as to prevent the grease from clogging.

the plunger common in such devices with grease.

Another object of theinventionis to pro vide a lubricator orf the character described with an improved signalmodgorgirdicator.

With these and other objets'in view, the

invention consists of certain novel forms of construction and combinations of parts, hereinafter fully described, illustrated in the accompanying drawing, and specifically set forth in the o aims. 4 1

. ln the accompanying dlawings like chan acters of reference indicate like par-ts in the -several views, and: Figurel is a side elevation of the lubricator constructed in accordance with this invention. tional view therethroug 'Fig 3 is a sideelevation partly in section of a modified form of the invention.

The numeral .10 indicates the body of the lubricator which is provided as at 11 with a stud or stein having the usual threads whereby it may be inserted in the opening through which the lubricantv is to be fed. The stem 11 is formed with an axial bore 13 of Sulli-l cient size as to permit the vflow therethrough of the solid or semi-solid lubricant intended to be contained in the body.

A plug or sto 14 is held within the body and 1s provide with screw threads 15 of proper proportion to engage screw threads 12 formed interiorly of the body 10. The plug 14 is recessed at the bottom as 'indicated at 16v 'and is furtherprovided with the reduced or minor recessed portion 17, above the 'recess 16. At the'top of the plug 1.4 there is provided an aperture as indicated at 18, and

, the plug is further provided VWithan annular groove 19 extending` around the shoulder ormed by the difference in the dimension ofrough the plug or top `14 is a. vent'oriivaste Fie. 2 is a vertical secf- "usual hexagonal p port 20 extendin lengthwise of the plug and i provided with a ranch 21 opening through the outer surface thereof.A siding at Grand Rapids, in the county of Within the recess 16, is provided a fol- :l lower piston as shown 'at This follower piston preferably is groeved fora suitable v packing as at 23.

eferring new ,to the form shown in Fig.

2, the follower piston has a plunger 24,

formed thereon, plunger 24 having a reduced stem 25. The plunger 24 is of such size as is of such length as toextend upward therethrough at all times, being provided with the eotter 26, to prevent entire retraction of the stein .Within the aperture. By reason of the stem forming a reduced portion of the plunger 24, there is provided a-space between the stem .25, and the side walls of the reee'ss'l. In the space thus formed is held a spring, of the spiral form as indicated at 27. This 'spring is so arranged as to length and tension at it acts to press the plunger 24 dowrh Ward and causes the piston 22, to assume its lowest position, the vlowest position of the plunger being intended to be such that the bottom 'of' said lunger will lie flush with the bottom of the p ug 14.

Referringnowto Fig. 3. The piston in this case is screwed to a stem 28, which is provvided with a collar 29, fitting in the top portion of the recess. An annular collar 30, is provided between the two portions of the rev cess and is of such size as to closely engage the stem 28. The upper end of the reduced recess 17,0pens directly'out of the top of the 'ug and is provided with screw threads 31. "tting this open portion of the recess is a plug '3.2, provided with screw threads to engage the tlueads 31, and furtherprovided with a centrally disposed'apertnre 33 wherein the upper end of the stem 28, is arranged to move. The upper end of thel stem 28, isof such length that when the collar 29, is in contact with the annular collar 30, the top of' the stem will be substantially kflush with thev top of the nut 32.

In boththe forms shown in Figs. 1 and 2, and the form shown in Fig. 3, there'is provided a jam nut 34, mounted on'theplug 14, so that the position of the latter may be properly maintained in the vbody 10Q The ,body 10 in all cas s is provided with the rtion 35', to enable the. -same to be properly vattached tothe beating;-

or crank pin box as may be desired. l There is also provided a nut 36,'on the plug to enable the same to be readily screwed in or out of the body.

- In theoperation of the device the body 10- is filled with a solid or semi-solid grease and theplug 14 is set therein and screwed down as far as it will go. This will cause the piston 22, to be forced up into the recess 16, and the spring 27 will thereby exert pressure tending to force the grease out of the aperture 13. As thegrease is forced out of this aperture and used up the piston 22, will descend. When the indicator stem 25, reaches its lowest point, the plug is screwed down again into the body and the same operation is'repeated. It will be noticed that these 'is at all times a proper amount of pressurie exerted on the grease to cause the same to flow through the aperture.

It will be understood from the foregoing that the stern 25 serves, in effect, as an indicator, inasmuch as when its upper end 1s nearly flush with the upper face of the nut 36 the attendant or oiler will understand that a firesh supply of lubricant is needed.

iShould any of the grease work up past the packing 23, on Ythe piston 22, during the time that the piston is moving downward, it will not be forced into the cavity/containing thel spring 27 when the piston moves upward, i

v but will pass up the vent 20, and branch 21,

and out of the cup. The spring 27 will thus at all times be kept free from an accumulation of grease, and willoperate properly under all conditions. l

It is obvious; thatminor changes may be made in the form and construction of the de'- viee without departing from the material principles thereof. Itis not therefore desired to confine the invention to the exact form herein shown and described, but it is Y wished to properly include such as come within the scope of this invention.

Having thus described the invention, what is claimed, is :-V

1. In a device of the class described, a body portion provided with an a erture at the ower end thereof and interna screw threads, a plug arranged to it within said body portion provided with a recess at the lower end thereof, said plug being provided also with a minor recess extending upward from the iirst mentioned recess and with an aperture leading from the minor recess to the top of said plug, said plug beingfurther provided with a vent leading from t e upper end of the first mentioned recess therein to the exterior of said plug, a piston held to move in the iirst mentioned recess, a plunger xcd to said piston and fitting the minor recess, a stem attaehed to said plunger, passing through and fitting the aperture in the plug, a spring held around the said stem and bearing against said plunger, to force the same down and a stop to limit the downward motion of said plunger.

2. In a device of the class described, a body portion having internal screw threads and a centrally disposed aperture in the bottom, a plug held within said body portion provided wit external threads to engage the internal threads of thesaid body portion and further provided with a centrally disposed lower recess in the bottom thereof, and with a minor upper recess leading from the centrally disposed recess, and with an aperture extending from the minor recess to the top of said plug, and further, with a vent extending from the lower recess to the exterior of said plug and the said lower recess opening into an annular groove connecting with said vent, a piston held within the lower recess, a plunger rigidly attached to said piston to extend within the jupper recess and closely fit the same, an indicator stem rigidly attached te the plunger and passing'through the said aperture, said stem being spaced from the walls of the up er recess, a spring held in the annular cham er formed bythe stem and the walls of the upper recess and arranged to force the plunger down, a stop to limit the downward motion of said plunger, and a lock nut carried on sai-d plug to lock the same in position withinthe body.

In testimony that I claim the foregoing as my own, I have hereto atiixed my signature in the presence of two witnesses.

WILLIAM CLOTHVVORTHY.

Witnesses:

C. G. TURNER, HARRY E. RoDGERs. 

